Triumphrat

twinrider · 07-09-2006

My '06 Tiger seems to have picked up an odd vibration through the pegs and a bit through the bars.
It happens in fifth and sixth gears, right around 4k rpm. If one is adding throttle its not noticable, but if I back off the throttle slightly I get a VERY coarse vibration until the revs drop below about 3800. When I first felt it I thought I had hit some pavement that had the upper surface of the asphalt taken off.
Its consistent, I can repeat it at any time.
I don't recall the bike doing this before, it currently has about 3000 miles on it. I'm pretty sure its engine and tranny feedback because if I simply pull the clutch in and close the throttle at 60 mph it starts coasting smooth as silk.
I checked the engine mounting fasteners, seems well there. The chain has about 1.5" slack in it (was a little looser, about 2" so I brought it to what the shop mechanics recommended).
I had a friend ride it who is not familiar with Tigers and deliberately didnt mention it to him before we switched bikes. It was the first thing he mentioned when he got off so I'm sure its not my imagination.
Any thoughts on this, or anyone experience anything similar?
I love the bike but if I thought I had to live with this I think I might be looking for something else.

Chyron · 07-09-2006

My 05 started doing the same thing about 1000 miles ago. I'll be interested in what you find out. I asked about it here, most of the advice centered around the chain.

Tassie_Tiger · 07-09-2006

1.5" slack in the chain is a bit on the tight side. 2" is better, and that should be with the bike off the centre stand, i.e. with the wheels taking the weight of the bike.

If you tightened the chain before you got the vibrations then I would adjust the chain back to 2" play.

marauder2 · 07-09-2006

deffo the chain,the slacker the better,i allways have it set at 50mm,i know it seems realy slack but it works for tiggers.

[ This message was edited by: marauder2 on 2006-07-09 22:49 ]

winger · 07-10-2006

I presume when you set the slack on the chain your sat on it!! awkward but possible,lean down feel with your finger,the instructions in the manual are rubbish,first Tiger i had set it by the book and with two of us on with luggage it was a banjo string.

Only yesterday had someone come round to the house while i'm preping the bike for a long trip,remarked how slack the chain looked,replied it sure as hell won't when were both on the bike it'll be perfect.

The reason why the Tiger is like it is?? it doesn't have a linkage system on the suspension like you see on Jap bikes.

The only other source of vibes with be the 'Tune' if the chain is Ok then go back to your dealer and get him to re-install it.

clive955 · 07-10-2006

if your running Metzlers, check the tyre pressures as well, these have a habit of causing vibrations if the pressure has dropped or if you do a lot of motorway miles, but looking at your milage, I would check the chain first as the other guys have mentioned.

TBirdG · 07-10-2006

I think it's just a crankshaft balance issue inherant in the triple engine. My '05 Tiger does it if I'm ~4000 RPM in fifth. When I upshift into sixth it goes away. I must say, as I break in the engine, it has lessened considerably. I feel it between the pegs, when it occurs, and I must admit it was disconcerting at first.

When I had my '97 Thunderbird, there was a vibration between 3200-3500 RPM, which totally disappeared when I changed the stock mufflers to Togas. I can't explain why it went away, but you and I have plenty of company with other Triumph triple owners who have described such a vibration in a certain RPM range.

Gerry

twinrider · 07-10-2006

Thanks for the replies.
I was sure the shop guys said 1.5" but I'll put it back to 2" and see what happens. I thought about this but didn't necessarily connect it because I had ridden it probably two weeks after adjusting it, but mostly commuting and no highways speeds.
TBirdG, I think we're talking about two different things. I know they vibrate some, my Daytona did and this one has also. This is something else again. VERY coarse.
Man, with that kind of slack I wonder if theres a market or possible benefit to some kind of chain tensioner for these bikes?

winger · 07-11-2006

Hi Joe

You'll ownly need a chain tensioner when it's standing still!!! get someone else to sit on it and have a look at the slack, it disappears,even better still get two people to sit on it and see how much difference it makes,don't get carried away with setting the chain at a set amount,set it to what is right with you on it.

Chris

tiger-rover · 07-11-2006

twinrider,

my 05 (5600 miles) has been doing the same thing. When in 4th at around 4000 rpm (~50mph) and I roll the throttle back slightly there is the vibe in the pegs and bars.

Have been experiencing this I think since day one and seems like it might be getting a little heavier with miles.

Hopefully this is normal operation and ok.

Nate